Use @CoreMethod's ability to have multiple names rather than a disjointed alias_method call.

Author: nirvdrum

src/main/java/org/truffleruby/core/array/ArrayNodes.java

@@ -1928,7 +1928,7 @@ private void reverse(ArrayOperationNodes.ArrayGetNode getNode, ArrayOperationNod
 
     }
 
-    @CoreMethod(names = "select", needsBlock = true, enumeratorSize = "size")
+    @CoreMethod(names = { "select", "filter" }, needsBlock = true, enumeratorSize = "size")
     @ImportStatic(ArrayGuards.class)
     @ReportPolymorphism
     public abstract static class SelectNode extends YieldingCoreMethodNode {

src/main/ruby/truffleruby/core/array.rb

@@ -501,8 +501,6 @@ def fetch(idx, default=undefined)
     self
   end
 
-  alias_method :filter, :select
-
   def first(n = undefined)
     return at(0) if undefined.equal?(n)